Suffren-class heavy cruiser. An order was given to reinforce the armor to protect her from 155 mm shells at distances of up to 18,000 m. After joining the ranks, Dupleix was assigned to the 1st Light Division of the 1st Squadron in Toulon, and she was later transferred to the 1st Cruiser Division. With the outbreak of hostilities, the cruiser participated in patrol and escort missions, as well as in raids on Genoa. After the capitulation of France, Dupleix made almost no trips out to sea.